How To Measure A Roof Pitch

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How to measure a roof pitch.

The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. Here are a couple examples. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. The underside of a barge rafter on a gable end.

Measure from the roof. How to determine or calculate roof pitch or roof slope 1. Position your level against the roof until the bubble of the vial sits between two lines. If this distance measures 4 inches you have a 4 in 12 pitch.

The underside of a rafter in the attic. Roof pitch is often expressed as a ratio between rise and run in the form of x 12. On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof. Take the measurement of the vertical.

For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. For example if the roof rises 4 feet and the span is 16 feet twice the run then the pitch is 4 16 or 1 4. It is often compared to slope but is not exactly the same. The underside of a rafter on a overhang at the bottom of the roof 3.

Pitch measurement method 1 1. Another method to find the roof pitch is to go into the attic and measure the rise. If you are trying hard to work out how to figure roof pitch measurements the calculator takes away all of those problems for you more or less instantly. 8 inches and you have an 8 in 12 pitch.

Roof pitch is simply the slopecreated by the rafter. If you do need to calculate the pitch an estimate or shortcut is usually more practical than measuring the roof s overall dimensions. How to calculate the pitch of a roof method one. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. If you are trying to learn how to measure roof pitch calculations accurately you should really consider the importance of using a calculator. It can be assessed in two ways either as the angle the rafter makes with the horizontal or the proportion between the rise and the run of the roof.

Measure from the attic. Take a measurement of 12 inches using a level.